From a1955f2a56710a22d19376e4a8e5a7bf3e794deb Mon Sep 17 00:00:00 2001
From: Tobias Tengler <45513122+tobias-tengler@users.noreply.github.com>
Date: Wed, 20 Mar 2024 14:55:47 +0100
Subject: [PATCH] Write error logs to stderr (#7003)

---
 .../src/CommandLine/Commands/ComposeCommand.cs      | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/HotChocolate/Fusion/src/CommandLine/Commands/ComposeCommand.cs b/src/HotChocolate/Fusion/src/CommandLine/Commands/ComposeCommand.cs
index 2c0fd8ca965..9a5f2d9cd1f 100644
--- a/src/HotChocolate/Fusion/src/CommandLine/Commands/ComposeCommand.cs
+++ b/src/HotChocolate/Fusion/src/CommandLine/Commands/ComposeCommand.cs
@@ -1,4 +1,5 @@
 using System.CommandLine;
+using System.CommandLine.IO;
 using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using System.Text.Json.Serialization;
@@ -293,17 +294,23 @@ public void Write(LogEntry e)
                 HasErrors = true;
             }
 
+            var writer = console.Out;
+            if (e.Severity == LogSeverity.Error)
+            {
+                writer = console.Error;
+            }
+
             if (e.Code is null)
             {
-                console.WriteLine($"{e.Severity}: {e.Message}");
+                writer.WriteLine($"{e.Severity}: {e.Message}");
             }
             else if (e.Coordinate is null)
             {
-                console.WriteLine($"{e.Severity}: {e.Code} {e.Message}");
+                writer.WriteLine($"{e.Severity}: {e.Code} {e.Message}");
             }
             else
             {
-                console.WriteLine($"{e.Severity}: {e.Code} {e.Message} {e.Coordinate}");
+                writer.WriteLine($"{e.Severity}: {e.Code} {e.Message} {e.Coordinate}");
             }
         }
     }